Tissue specimen retrieval devices

Abstract

A tissue specimen retrieval device includes a first shaft and a second shaft telescopically movable relative to the first shaft. The second shaft supports an end effector assembly. The end effector assembly includes a tissue specimen bag supported by a first arm and a second arm extending from the distal end portion of the second shaft. A brim defines a bag mouth. The first and second arms open the bag mouth. A bag body extends from the brim and defines a pouch for a tissue specimen. The bag body reversibly furls and unfurls about the brim. The first arm includes a first upper arm and a first lower arm defining a first channel. The second arm includes a second upper arm and a second lower arm defining a second channel. The bag body is supported in the first channel and the second channel when the bag body is furled.

What is claimed is: 
     
       1. A tissue specimen retrieval device, comprising:
 a first shaft; 
 a second shaft telescopically movable relative to the first shaft, the second shaft supporting an end effector assembly at a distal end portion thereof and movable relative to the first shaft between a retracted position, wherein the end effector assembly is disposed within the first shaft, and a deployed position, wherein the end effector assembly extends distally from the first shaft, the end effector assembly including: 
 a tissue specimen bag supported by a first arm and a second arm, the first and second arms extending from the distal end portion of the second shaft; 
 a brim defining a bag mouth, the first and second arms configured to open the bag mouth when the second shaft is in the deployed position; and 
 a bag body extending from the brim and defining a pouch configured to contain a tissue specimen therein, the bag body configured to reversibly furl and unfurl about the brim, 
 the first arm including a first upper arm and a first lower arm vertically aligned with the first upper arm, the first arm defining a first channel between the first upper arm and the first lower arm, 
 the second arm including a second upper arm and a second lower arm vertically aligned with the second upper arm, the second arm defining a second channel between the second upper arm and the second lower arm, 
 wherein at least a portion of the bag body is supported in the first channel and the second channel when the bag body is furled. 
 
     
     
       2. The tissue specimen retrieval device of  claim 1 , wherein the bag body includes at least one spine operably associated with the brim and depending therefrom, the at least one spine configured to reversibly furl and unfurl the bag body about the brim. 
     
     
       3. The tissue specimen retrieval device of  claim 1 , wherein the brim includes a shape memory alloy including at least one of nickel or titanium. 
     
     
       4. The tissue specimen retrieval device of  claim 2 , wherein the at least one spine includes a shape memory alloy including at least one of nickel or titanium. 
     
     
       5. The tissue specimen retrieval device of  claim 1 , wherein the brim has a width of less than 15 mm. 
     
     
       6. The tissue specimen retrieval device of  claim 1 , wherein the furled bag body is supported between the first upper arm, the first lower arm, the second upper arm and the second lower arm in the first shaft when the second shaft is in the retracted position. 
     
     
       7. The tissue specimen retrieval device of  claim 1 , wherein the first upper arm, the first lower arm, the second upper arm and the second lower arm each include a shape memory alloy including at least one of nickel or titanium. 
     
     
       8. The tissue specimen retrieval device of  claim 1 , wherein the first arm is selectively detachable from the second arm. 
     
     
       9. A tissue specimen bag, comprising:
 a first arm and a second arm; 
 a brim defining a bag mouth, the first and second arms configured to open the bag mouth; and 
 a bag body extending from the brim and defining a pouch configured to contain a tissue specimen therein, the bag body configured to reversibly furl and unfurl about the brim, 
 the first arm including a first upper arm and a first lower arm vertically aligned with the first upper arm, the first arm defining a first channel between the first upper arm and the first lower arm, 
 the second arm including a second upper arm and a second lower arm vertically aligned with the second upper arm, the second arm defining a second channel between the second upper arm and the second lower arm, 
 wherein at least a portion of the bag body is supported in the first channel and the second channel when the bag body is furled. 
 
     
     
       10. The tissue specimen bag of  claim 9 , wherein the bag body includes at least one spine operably associated with the brim and depending therefrom, the at least one spine configured to reversibly furl and unfurl the bag body about the brim. 
     
     
       11. The tissue specimen bag of  claim 10 , wherein the at least one spine includes a shape memory alloy including at least one of nickel or titanium. 
     
     
       12. The tissue specimen bag of  claim 9 , wherein the brim includes a shape memory alloy including at least one of nickel or titanium. 
     
     
       13. The tissue specimen bag of  claim 9 , wherein the brim has a width of less than 15 mm. 
     
     
       14. The tissue specimen bag of  claim 9 , wherein the first upper arm, the first lower arm, the second upper arm and the second lower arm each include a shape memory alloy including at least one of nickel or titanium. 
     
     
       15. The tissue specimen bag of  claim 9 , wherein the first arm is selectively detachable from the second arm. 
     
     
       16. A method of deploying a tissue specimen bag, comprising:
 telescopically advancing a second shaft from a first shaft, the second shaft supporting a tissue specimen bag at a distal end portion thereof, the tissue specimen bag including: 
 a first arm and a second arm, the first and second arms extending from the distal end portion of the second shaft; 
 a brim defining a bag mouth, the first and second arms configured to open the bag mouth; and 
 a bag body extending from the brim and defining a pouch configured to contain a tissue specimen therein, the bag body including at least one spine operably associated with the brim and depending therefrom, the at least one spine configured to reversibly furl and unfurl the bag body about the brim, 
 the first arm including a first upper arm and a first lower arm vertically aligned with the first upper arm, the first arm defining a first channel between the first upper arm and the first lower arm, 
 the second arm including a second upper arm and a second lower arm vertically aligned with the second upper arm, the second arm defining a second channel between the second upper arm and the second lower arm, 
 wherein at least a portion of the bag body is supported in the first channel and the second channel when the bag body is furled; 
 opening the bag mouth by expanding the first and second arms to expand the brim; and 
 unfurling the bag body from the first channel and the second channel by unwinding the at least one spine to expand the pouch. 
 
     
     
       17. The method of  claim 16 , wherein the brim includes a shape memory alloy including at least one of nickel or titanium.